52 THE ESSEX NATURALIST.
Sketch Map of the Upper Valley of the Cam, showing the Neolithic Sites
in relation to the Geology, Water Supply and Recent Settlements.
Ik.: Ickleton. Lb.: Littlebury. L.C.: Little Chesterford. Wd.: Wenden.
Wk.: Wicken. C.H.L.: Chiswick Hall. C.H.: Coploe Hill. R.H.: Ring Hill
Camp. G.D.W.: Grimms Dyke Wood.